Your calculations stay here.

Effective October 23, 2026.

Calculator inputs

Calculations run in your browser. This site does not send your input values or worksheets to an application server. CSV files are generated locally when you click Download. Printing uses your browser’s print feature.

Hosting

The website is hosted on Cloudflare Pages. Loading a page sends standard network information, including an IP address and request details, to the hosting provider. Read Cloudflare’s privacy policy for its handling of that information.

Cookies, ads and measurement

This version does not set application cookies or use an analytics tracker. It contains publisher and search-verification metadata, which does not itself load advertising code. Advertising is not currently active. If that changes, this notice and any required consent controls will be updated before advertising is enabled.

External links

Reference links take you to other websites with their own policies. No calculator input is appended to those links. You can use the calculators without following them or creating an account.

Your files

There is no upload feature. Do not enter names, contact information or confidential project notes into numeric fields. Downloaded worksheets remain under your control.